Elevator gate



l. M. Posom May 17 ELEVATUR GATE Filed Oct. 25, 1926 x :Ina

milllllllllllllls v lx'IA 1 l Il S14/vento@ unirse sra Patented May 17,1927.

ma ivr. rostroiv, or' DALtAsj'rEXAS.

ELEVATOR GATE.

ApplikationV filed october 25, 192e. seriarNQi/i'ams.-

This invention relates to new and useful improvements in elevator gates.

I The object of the invention is to provide a gate comprising telescoping sections suspende-d by differential flexible connections, whereby said sections telescope as the gate is elevated, thus 4permitting Vrthe gatel to be used in opening with a limited overhead clearance. y v

A construction designed to carry ,out the invention will be hereinafter described, together 4with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is an elevation of a gate constructed in accordance Ywith my invention, the gate being shown in full lines in its lowered or closed position and in dotted lines in its elevated open position,

Fig. 2 is a vertical sectional view taken on the line 2-2 of Fig..4 1,

Fig. 3 is a cross-sectional view taken on the line 3-3 of Fig. 1.

In the drawings the numeral 10 designates a gate frame having vertical guideways 11 on each side. A pair of gate sections 12 and 13 are mounted to slidevertically in these guideways.

The lower section 12 comprises ay transverse bottom bar 14 connected with a transverse top rail 15 by vertical spaced slats or stays 16. The slats 16 extend through vertical slots 17 in the bottom bar 18ct the upper gate section 13, which bar underlies the rail 15.

The upper section 13 comprises vertical slats 19 in'staggered relation to the slats 16 extending through slots 2O in the top rail 15 of the lower section 12. The slats 19 sup: port a top rail 21. The sections may be telescoped by sliding the rail 15 up the slatsv 19, whereby the slats 16 are slid up through the bar 18. y

The rail 15 is secured to the lower end of a rope, cable or other flexible connection 22 which extends up and over a pulley 23 depending from the center of the lintel 10 of the gate frame. This rope extends under the lintel, and passes over a pulley 24 in the upper end of a boxing 25 at one side of the frame. The rope hangs in the boxing and has a counterbalancing weight 26 on its lOWer end.

d Differential ropes, cables or the like 27 depend from eye bolts 2S near each end of the lintel 10K. These ropes pass under pulleysx29 mounted on thebottoinbar 18 of the uppery gate section 13, then up and over pulleys 3.0 on ,the top rail 1'5 of the lower gate section 12. The ends of the ropes are fastened to vthe bar 18. j It willbe seen thatas the gate sections are moved upwardly the weight 26 will. pull the rope 22 over the pulleys 23 and 24, thus counterbalancing said sections and holding them in the positionV to which they are moved. The upper gate section 13 being supported only by the loops of the ropes eov 27 and the pulleys 29 and 30 will be suspended thereby. Thus as the lower section 1s raised, the upper section will also be elevated, but the loops will elongate owing to the .f passagev of the ropes over the said pulleys. Y Y

This action will cause the lower gate section 12 to move faster than the lower gate section 13, whereby the rail 15 and the bar 1.8 willvseparate, thus causing said sections to telescope and reduce the height of the gate. 1When the gate reaches its upper limit the sections will have completely telescoped as is shown in 'dotted lines in Fig. 1. This will raise the bottom bar 141 high enough to give the desired Ahead room, but the gate will occupy considerably less space than when it is open.

`Various changes in the size and shape of the different parts, as well as modifications and alterations, may be made within the scope of' the appended claims.

What I claim, is: v

1. In an elevator gate, a gate frame, a pair of telescoping gate sections mounted to slide verticallyin said frame, a flexible connection suspended in the frame and supporting the lower gate section, a counterbalance attached tol said connection, other flexible connections suspended from the top of the frame and attached to the upper gate section, and revolving supports on both sections and over which the last named flexible connections are looped.

2. In an elevator gat-e, a gate frame, a pair vof telescoping gate sections mounted to slide 'vertically in said frame, a flexible connection suspended in the frame and supporting the lower gate section, a counterbalance attached to said connection, otherv flexible connections, Suspended from the top of the frame and attached to the uper gate section, and pulleys mounted on the hottom o the upper section and upon the top of the lower section and over which the last named connections are looped.

3. In an elevator gate, a gate frame, a pair of slatted gate sections, the slats of the lower section telescoping through the bottom har of the upper section and the slats of the upper section telesoopi'ng through the top rail ofthe lower section, pulleys at' the top of the frame, a connection passing over the pulleys and having one end attached to the lower gate section, a oounterbalanee attached to said connection, other flexible connections having their upper ends attached to the top of the frame and their lower ends attached tothe upper gate sections, and pulleys mounted ou the sections and over which the last named connections are doublelooped.

Lenaerts 4. In an elevator gate, a gate -iframe, a pair of slatted gate sections, the slats of the lower section telescoping through the loottom loar of the upper section and the slats of the upper section telescoping through the top rail of the lower section, pulleys at the top of the frame, a connection passing over the pulleys and having one end attached to the lower gate section, a counterbalance attached to said connection7 other flexible connections having their upper ends attaohed to the top of the fra-me and their lower ends secured to the bottom of the upper gate section7 pulleys mounted on the bottom bar of the upper section and upon the top rail of the lower section and over which the last named connections are double-looped.

In testimony whereof I affix my signature.

IRA M. POSTON. 

